CN1923722A - Landscape type composite under-current artificial wetland sewage treatment method - Google Patents

Landscape type composite under-current artificial wetland sewage treatment method Download PDF

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Publication number
CN1923722A
CN1923722A CNA200510047134XA CN200510047134A CN1923722A CN 1923722 A CN1923722 A CN 1923722A CN A200510047134X A CNA200510047134X A CN A200510047134XA CN 200510047134 A CN200510047134 A CN 200510047134A CN 1923722 A CN1923722 A CN 1923722A
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wetland
treatment method
type composite
composite under
vertical
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CNA200510047134XA
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Inventor
李培军
尹炜
张海荣
雷阿林
李德旺
叶闽
韩小波
郭立平
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Institute of Applied Ecology of CAS
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Institute of Applied Ecology of CAS
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Priority to CNA200510047134XA priority Critical patent/CN1923722A/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/10Biological treatment of water, waste water, or sewage

Abstract

The invention discloses an artificial marshland effluent disposing method of landscape-typed composite underflow, which is characterized by the following: flowing predisposed urban effluent through composite underflow artificial marshland with vertical and level artificial marshlands; entering water from marshland to ecological gathering groove in the ground water. The invention possesses peculiar denitrogenation effect, which removes TSS and BOD in the effluent effectively.

Description

A kind of landscape type composite under-current artificial wetland sewage treatment method
Technical field
The present invention relates to ecological wastewater processing, specifically a kind of landscape type composite under-current artificial wetland sewage treatment method.
Background technology
Artificial swamp is a kind of sewage disposal technology that grows up late 1970s, have distinct characteristic and advantage, accepted all over the world very soon, be widely used in the processing of various waste water such as sanitary sewage, storm runoff, trade effluent, agricultural runoff, acid mining wastewater and percolate now.Artificial swamp is the Sewage treatment systems that a kind of artificial design can realize the natural wetland ecological process, it makes full use of wetland plant, soil and microorganism thereof and removes pollutants in sewage, the same with other natural treatment systems, have important sewage disposal and resource recovery function.
Artificial swamp can be divided into two types according to the position of the water surface: surface low artificial swamp and drowned flow artificial wet land; Compare the current wetland high insulating effect with the surface low artificial swamp, treatment effect is subjected to the influence in weather, season less, and management is proper in the operational process can effectively prevent the breeding of flies and mosquitoes and the stink generation, but it is big many that the output investment ratio surface-flow is wanted, and at present adopts drowned flow artificial wet lands to dispose of sewage both at home and abroad more.Drowned flow artificial wet land also can be divided into horizontal drowned flow artificial wet land and vertical subsurface flow wetland according to leading current.
The horizontal drowned flow system is adopted by people at first, the example that a large amount of operations are also arranged at present, when being used to second-stage treatment, can remove BOD and TSS in the sewage effectively, because the little efficiencies of nitrogen removal of oxygen transmission quantity is poor, to through the waste water of nitration treatment denitrification for Removing Nitrogen effectively, can reach good nitrification effect when being used for tertiary treatment.On the whole, the horizontal flow system is because its filtration capacity can be removed TSS and pathogenic bacteria, and the removal of BOD and oxygen transmission quantity are closely related, and BOD, TSS and pathogenic bacteria can reach higher removal, have denitrification function; It is poor that shortcoming is exactly the oxygen transmit force, so nitrated ability is lower to the clearance of ammonia nitrogen and TN.
The vertical current system has very high oxygen transmittability, not only can remove BOD effectively, and can realize effectively nitratedly, also can remove pathogenic bacteria; Land seizure amount (1-2m in addition 2/ pe) lack (5-10m than horizontal flow 2/ pe).So receive very big concern recent years, obtained promotion and application largely.Its shortcoming is, and is relatively poor to the removal effect of TSS, and stops up easily.
At present, applying of domestic artificial swamp technology also mainly is the wet land system of single flow pattern, perhaps adopts undercurrent surface low bonded form, also the precedent of vertical current system and horizontal flow system in combination not being used, though the research of some this respects is arranged, only limits to laboratory simulation.In addition, in the construction of present artificial swamp, body of wall generally adopts brick mix structure around the wetland, and this wall body structure will be higher than the wetland surface, is exposed to the surface, has influenced the landscape value and the ecological significance of wetland greatly.
Summary of the invention
The object of the present invention is to provide a kind of landscape type composite under-current artificial wetland sewage treatment method, the present invention adopts the composite under-current artificial wetland system that sewage is handled, COD, TSS and pathogenic bacteria in the sewage not only can be removed, and the total nitrogen in the sewage can be effectively removed.
Another object of the present invention provides a kind of artificial wet land system of landscape type, and its engineering sign that can weaken improves and human avidity, and the environment around beautifying is brought into play its ecological and aesthstic meaning fully when disposing of sewage.
To achieve these goals, the technical solution used in the present invention is as follows:
A kind of landscape type composite under-current artificial wetland sewage treatment method, to or store the later municipal effluent of sedimentation pool pre-treatment through settling tank according to the front and back composite under-current artificial wetland by forming in proper order by vertical current constructed wetland and horizontal drowned flow artificial wet land, wetland effluent enters ecological collecting gutter, can enter surface water body then.
Described vertical current constructed wetland area is greater than horizontal drowned flow artificial wet land, and area is than being (2~6): 1, and handling the needed land area of unit vol sewage is 4~8m 2/ (m 3D) (be approximately equal to 1~2m 2/ pe); The water of vertical current constructed wetland flows from the top down, and the feed-water end bottom surface of horizontal drowned flow artificial wet land is higher than the bottom surface, water side, and its gradient is 0.5~8%; Weighting material particle diameter in the wetland can be 0.1~80mm, and it can be soil, stone, slag, sand and/or haydite, they arrangement mode can be size grading or even grating;
The vertical current constructed wetland system can be set to 2~10 unit parallel connections, can realize the circular gap operation, improve operational efficiency and system stability, adopt round-robin intermittent operation water distribution and pressurization perforated pipe mode usually, increase contacting and then improving dissolved oxygen in the sewage of sewage and air; Removal to nitrogen element in the sewage has good effect; Vertical-flow wetland can adopt perforated tube pressurization water distribution manner usually, can increase contacting of sewage and air like this, the wetland medium adopts no native different-grain diameter gravel grating, it is weedy to prevent effectively that wet land system from forming the phase, the wetland degree of depth is 40-70cm, can be according to the corresponding adjustment of selecting of wetland plant, wetland plant adopts the Canna generalis Bailey of the big and better appearance of biomass, cattail, calamus etc., the all round structure of wetland adopts bamboo clappers wall (enclosure wall of wetland adopts the bamboo clappers wall construction to replace the brick mix structure engineering sign that weakens), impervious barrier coheres on the bamboo clappers wall, bamboo clappers wall superelevation 10-20mm, the shape of wetland can adopt irregularly shaped as oval or suit measures to local conditions, can turf plant between the wetland unit or establish rubble and mark time for visitor's walking.
For nitrated more fully, can design the series connection between the vertical current constructed wetland unit, so general secondary vertical current cellar area is 1/2~1/3 of a primary unit area, promptly in system behind original one group of vertical current constructed wetland, the vertical-flow wetland of can connecting again, wherein placed in-line secondary vertical-flow wetland area is 1/2~1/3 of an one-level vertical-flow wetland;
The horizontal drowned flow wetland can be established one or more levels; The water outlet of horizontal drowned flow artificial wet land flows in the ecological collecting gutter, the rising pipe at its water outlet place upwards bends the 30-90 degree after stretching out wetland, bending simultaneously partly can be along the axial rotation of rising pipe, it is adjustable making the water outlet water level, adopt this adjustable mode, regulate water level in freeboard and the wetland by the regulation of level pipe, make the operational conditions of wetland changeable, assurance system long-term stability; Simultaneously the water outlet return line can be set, under the unfavorable situation of effluent quality, can make water outlet be back to the vertical current system, increase the handiness of operation scheme, guarantee the water quality of water outlet simultaneously.
Wetland effluent flows into the ecological ditch that catchments, and further purifies water outlet, and beautify the environment (water outlet can reflux to improve effluent quality), finally arranges to surface water body by ecological ditch; Ecological trench depth is suitable with the horizontal drowned flow wetland degree of depth, places the adjustable rising pipe of horizontal drowned flow wetland in the ditch, can intersperse a little emergent and floating plant in the ditch, and limes marginis lawn bank protection can utilize the ecosystem in the ditch further to purify water outlet.
A kind of landscape type composite under-current artificial wetland of the present invention has carried out optimum combination to prior art, for the popularization and the application of artificial swamp ecological wastewater processing technology provides theoretical foundation, has more following advantage:
1. the relative merits of horizontal drowned flow system and vertical current system can be complemented each other, better to sewage treatment effect, can effectively remove BOD, TSS and TN.Landscape type composite under-current artificial wetland of the present invention is the system that has vertical subsurface flow wetland and horizontal drowned flow artificial wet land to combine, vertical-flow wetland is positioned at the front portion of system, horizontal drowned flow is positioned at the system rear portion, sewage is through settling tank or after storing sedimentation pool pre-treatment, at first enter the vertical-flow wetland system, TSS and BOD in the sewage are effectively removed, reach nitrated preferably simultaneously, the removal of BOD and nitratedly finish synchronously, this mainly is an oxygen transmittability of having utilized the vertical current system higher, also make organonitrogen change into ammonia nitrogen in addition in the vertical current system simultaneously, denitrification has taken place in a spot of nitrate; The water outlet of vertical current system enters its undercurrent system of level, because its oxygen transmittability is poor, environment is to detest anaerobic environment in the system, pollutants in sewage is further removed in the horizontal flow system, main scrubbing process is a nitrate generation anti-nitration reaction in the waste water, and the TN in the sewage is effectively removed.
2. the present invention has unique removal effect to nitrogen element in the sewage, ammonia nitrogen has obtained sufficient nitrated, the nitrate nitrogen that forms has also been realized the denitrification of part, when the BOD value in the sewage is low, can also realize endogenous denitrification, make the nitrogen element finally change into gas release, realized substantial denitrogenating, fundamentally alleviated the polluted by nitrogen of surface water body.
3. the present invention has unique landscape effect, the engineering sign of artificial wet land treating system in the past that weakened has increased sewage ecological treatment system and human avidity, has also guaranteed environmental health simultaneously, beautified environment, the resident around giving has increased the good place to go of a leisure.
4. operation scheme of the present invention is multiple, and adjustable controlled.The vertical current system can the circular flow of a plurality of unit, can guarantee system stability like this, has improved the efficient of system again; The horizontal drowned flow water outlet is adjustable has also carried out effective adjusting maintenance to system itself.
5. the ecological collecting gutter of water outlet inflow not only plays the effect of the draining of catchmenting, and can further purify water outlet simultaneously, and can be same with the wet land system harmony, beautified surrounding environment, the ecotope around having improved has high ecological and environmentalism meaning.
Description of drawings
Fig. 1 is a landscape type composite under-current artificial wetland schema of the present invention;
Fig. 2 is a landscape type composite under-current artificial wetland plot plan of the present invention;
Fig. 3 is the used discharging device structural representation of horizontal drowned flow system among Fig. 2.
Embodiment
As shown in Figure 1-Figure 3, sewage is through pre-treatment facility 1 (septic tank, grid-settling tank, and/or store the sedimentation pool etc.) handle after, promote pressurization through sewage pump plant 2 and enter into vertical current constructed wetland system 4, water inlet is that the perforated pipe 5 by the wetland top layer reaches water distribution uniformity, the water outlet of perforated pipe aperture sprays obliquely, increased and the contacting of air, the a large amount of oxygen that enters system by rolling action also can be realized system more fully in the removal of effectively finishing BOD nitrated, long-term stability for the processing efficiency that improves the vertical current system and the system of assurance, can carry out the operation scheme of circular gap, mainly realize by regulating each unit inlet valve 3.Vertical-flow wetland is collected the back flow by gravity by the bottom perforated pipe and is entered in the horizontal drowned flow artificial wet land system 8, the horizontal drowned flow system makes the BOD in the water, TSS and pathogenic bacteria etc. are further removed, making in the waste water itrated nitrogen element carry out denitrification becomes nitrogen and discharges, realize the most basic denitrogenating, under the lower situation of the organic concentration of waste water, some denitrification is an endogenous denitrification, the water outlet of horizontal flow system is adjustable, mainly regulate freeboard by water outlet setting device 9, also reached simultaneously the effect of adjusting water level in the wetland, adjusting by water level can reach the purpose of adjusting the horizontal drowned flow system running state, finishes water outlet by the height of regulating regulation of level pipe 12 after setting device is collected the water of handling by bottom collection tube 13 and regulates.Water outlet is directly arranged to surface water body 11 through the collection and the further back that purifies of ecological collection ditch 10.When the water outlet of horizontal drowned flow system is undesirable, can start reflux pump 2 with effluent recycling to feed-water end, in addition in order to reach better wastewater treatment efficiency in total system, can connect some vertical-flow wetland unit 6 and horizontal drowned flow wetland unit 7.
Can reference about the structure of vertical current and horizontal drowned flow: " Wu Xiaolei, artificial swamp wastewater treatment mechanism, environmental science, 1995,16 (3): 83-86 "; In content; Above-mentioned composite under-current artificial wetland is the sewage ecological treatment system that is combined by vertical subsurface flow wetland and horizontal drowned flow artificial wet land, has unique efficiencies of nitrogen removal, after the pre-treatment such as the sewage process settling tank or the settlement on storage pool, enter the vertical-flow wetland system, it is nitrated preferably that TSS in the sewage and BOD reach when effectively being removed, water outlet enters the horizontal drowned flow system, because its oxygen transmittability is poor, environment is to detest anaerobic environment in the system, main scrubbing process is a nitrate generation anti-nitration reaction in the waste water, TN in the sewage is effectively removed, water outlet flows into the ecological ditch that catchments, and finally arranges to surface water body by ecological ditch; Wetland plant adopts the Canna generalis Bailey, cattail, calamus of the big and better appearance of biomass etc., and the peripheral structure of wetland adopts the bamboo clappers wall, has beautified surrounding environment, has effectively prevented the pollution to surface water, particularly to the obvious reduction of polluted by nitrogen; Wherein the vertical current constructed wetland area is greater than horizontal drowned flow artificial wet land, and the area ratio can be (2~6): 1, and handling the needed land area of unit vol sewage is 4~8m 2/ (m 3D) (be approximately equal to 1~2m 2/ pe), vertical current can be 2~10 unit parallel connections, realizes the circular gap operation; For nitrated more fully, can design the series connection between the vertical current constructed wetland unit, so general secondary vertical current cellar area is 1/2~1/3 of a primary unit area; The horizontal drowned flow wetland can be established one or more levels series connection, and the water outlet water level is adjustable, sets out the water return line, can make water outlet be back to the vertical current system under the unfavorable situation of effluent quality, has increased the handiness of operation scheme, has guaranteed the water quality of water outlet simultaneously.
The present invention shows in experimental applications, adopts 1800m 2Composite under-current artificial wetland handle 560m 3The urban surface initial stage runoff of/d (outer each the pollutent index of removing heavy metals is lower than sanitary sewage slightly), water outlet can reach first discharge standard fully, and particularly the TN water outlet is 23.81 ± 2.41mg/l, and clearance reaches more than 60%.

Claims (7)

1. landscape type composite under-current artificial wetland sewage treatment method, it is characterized in that: will be through pretreated municipal effluent according to the front and back composite under-current artificial wetland by forming by vertical current constructed wetland and horizontal drowned flow artificial wet land in proper order, wetland effluent enters ecological collecting gutter, can enter surface water body then.
2. according to the described landscape type composite under-current artificial wetland sewage treatment method of claim 1, it is characterized in that: described vertical current constructed wetland system can be set to 2~10 unit parallel connections.
3. according to the described landscape type composite under-current artificial wetland sewage treatment method of claim 1, it is characterized in that: the water outlet of described horizontal drowned flow artificial wet land flows in the ecological collecting gutter, the rising pipe at its water outlet place upwards bends the 30-90 degree after stretching out wetland, and bending simultaneously partly can be along the axial rotation of rising pipe.
4. according to the described landscape type composite under-current artificial wetland sewage treatment method of claim 1, it is characterized in that: can be in series with vertical-flow wetland again behind the vertical current constructed wetland in the described system, wherein placed in-line secondary vertical-flow wetland area is 1/2~1/3 of an one-level vertical-flow wetland.
5. according to the described landscape type composite under-current artificial wetland sewage treatment method of claim 1, it is characterized in that: described vertical current constructed wetland area is greater than horizontal drowned flow artificial wet land, the area ratio is 2~6: 1, and handling the needed land area of per unit amount sewage is 4~8m 2/ (m 3D).
6. according to the described landscape type composite under-current artificial wetland sewage treatment method of claim 1, it is characterized in that: the water of described vertical current constructed wetland flows from the top down, the feed-water end bottom surface of horizontal drowned flow artificial wet land is higher than the bottom surface, water side, and its gradient is 0.5~8%; Weighting material particle diameter in the wetland can be 0.1~80mm, and it can be soil, stone, slag, sand and/or haydite, they arrangement mode can be size grading or even grating.
7. according to the described landscape type composite under-current artificial wetland sewage treatment method of claim 1, it is characterized in that: described vertical-flow wetland adopts perforated tube pressurization water distribution manner, and the wetland degree of depth is 40-70cm.
CNA200510047134XA 2005-09-02 2005-09-02 Landscape type composite under-current artificial wetland sewage treatment method Pending CN1923722A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101274798B (en) * 2008-05-16 2010-06-02 哈尔滨工业大学 Composite constructed wetland system and pretreatment method for drinking water source
CN101792231A (en) * 2010-03-02 2010-08-04 河北农业大学 Composite artificial wetland sewage treatment method
CN102518077A (en) * 2011-12-22 2012-06-27 四川大学 Community wetland design
CN102910739A (en) * 2012-10-22 2013-02-06 中国科学院沈阳应用生态研究所 Purification method of drainage outside rice field in estuarine area
CN104529073A (en) * 2014-12-23 2015-04-22 上海市园林科学研究所 Solar-driven constructed-wetland purification treatment system for landscape water body
CN106145313A (en) * 2016-09-05 2016-11-23 上海勘测设计研究院有限公司 A kind of radial-flow water ecology cleaning system
CN112585068A (en) * 2018-08-26 2021-03-30 阿亚拉皮恩比斯有限公司 Modular water purification system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101274798B (en) * 2008-05-16 2010-06-02 哈尔滨工业大学 Composite constructed wetland system and pretreatment method for drinking water source
CN101792231A (en) * 2010-03-02 2010-08-04 河北农业大学 Composite artificial wetland sewage treatment method
CN102518077A (en) * 2011-12-22 2012-06-27 四川大学 Community wetland design
CN102910739A (en) * 2012-10-22 2013-02-06 中国科学院沈阳应用生态研究所 Purification method of drainage outside rice field in estuarine area
CN104529073A (en) * 2014-12-23 2015-04-22 上海市园林科学研究所 Solar-driven constructed-wetland purification treatment system for landscape water body
CN106145313A (en) * 2016-09-05 2016-11-23 上海勘测设计研究院有限公司 A kind of radial-flow water ecology cleaning system
CN112585068A (en) * 2018-08-26 2021-03-30 阿亚拉皮恩比斯有限公司 Modular water purification system
US11713267B2 (en) 2018-08-26 2023-08-01 Ayala Pnbs Ltd. Modular water purification system

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